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java.lang.Objectorg.apache.lucene.analysis.Analyzer
org.apache.lucene.analysis.ar.ArabicAnalyzer
public final class ArabicAnalyzer
Analyzer
for Arabic.
This analyzer implements light-stemming as specified by: Light Stemming for Arabic Information Retrieval http://www.mtholyoke.edu/~lballest/Pubs/arab_stem05.pdf
The analysis package contains three primary components:
ArabicNormalizationFilter
: Arabic orthographic normalization.
ArabicStemFilter
: Arabic light stemming
Field Summary | |
---|---|
static String |
DEFAULT_STOPWORD_FILE
File containing default Arabic stopwords. |
static String |
STOPWORDS_COMMENT
The comment character in the stopwords file. |
Fields inherited from class org.apache.lucene.analysis.Analyzer |
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overridesTokenStreamMethod |
Constructor Summary | |
---|---|
ArabicAnalyzer()
Builds an analyzer with the default stop words: DEFAULT_STOPWORD_FILE . |
|
ArabicAnalyzer(File stopwords)
Builds an analyzer with the given stop words. |
|
ArabicAnalyzer(Hashtable stopwords)
Builds an analyzer with the given stop words. |
|
ArabicAnalyzer(String[] stopwords)
Builds an analyzer with the given stop words. |
Method Summary | |
---|---|
org.apache.lucene.analysis.TokenStream |
reusableTokenStream(String fieldName,
Reader reader)
Returns a (possibly reused) TokenStream which tokenizes all the text
in the provided Reader . |
org.apache.lucene.analysis.TokenStream |
tokenStream(String fieldName,
Reader reader)
Creates a TokenStream which tokenizes all the text in the provided Reader . |
Methods inherited from class org.apache.lucene.analysis.Analyzer |
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close, getOffsetGap, getPositionIncrementGap, getPreviousTokenStream, setOverridesTokenStreamMethod, setPreviousTokenStream |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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public static final String DEFAULT_STOPWORD_FILE
public static final String STOPWORDS_COMMENT
Constructor Detail |
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public ArabicAnalyzer()
DEFAULT_STOPWORD_FILE
.
public ArabicAnalyzer(String[] stopwords)
public ArabicAnalyzer(Hashtable stopwords)
public ArabicAnalyzer(File stopwords) throws IOException
STOPWORDS_COMMENT
IOException
Method Detail |
---|
public final org.apache.lucene.analysis.TokenStream tokenStream(String fieldName, Reader reader)
TokenStream
which tokenizes all the text in the provided Reader
.
tokenStream
in class org.apache.lucene.analysis.Analyzer
TokenStream
built from an ArabicLetterTokenizer
filtered with
StopFilter
, LowerCaseFilter
, ArabicNormalizationFilter
and ArabicStemFilter
.public org.apache.lucene.analysis.TokenStream reusableTokenStream(String fieldName, Reader reader) throws IOException
TokenStream
which tokenizes all the text
in the provided Reader
.
reusableTokenStream
in class org.apache.lucene.analysis.Analyzer
TokenStream
built from an ArabicLetterTokenizer
filtered with
StopFilter
, LowerCaseFilter
, ArabicNormalizationFilter
and ArabicStemFilter
.
IOException
|
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